.dow{
	.dow_img{
		position: absolute;
		top:0;
		left:0;
		width:100%;
		/*height:100%;*/
	}
	.dow_btn{
		width:17.0rem;
		height:4.333333rem;
		position: absolute;
		top:29.5rem;
		left:50%;
		margin-left: -8.5rem;
	}
}